Largest mammalian litter size?

[mathog at seqaxp.bio.caltech.edu]

Idle curiousity time.

What mammal has, on average, the largest litter size?

(No practical reason for asking, the topic just happened to
come up at lunch.)

I'm not betting money on it, but my guess is that it is some breed of
domestic pig.

Anybody know for sure?

Regards,

David Mathog
mathog at seqaxp.bio.caltech.edu
Manager, sequence analysis facility, biology division, Caltech